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Finding the Fourth Proportional to 890.97, 1,229.95 and 654.92

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Solution

The fourth proportional to 890.97, 1,229.95 and 654.92 is: 904.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.97 : 1,229.95 = 654.92 : x
  2. Step 2: Convert to fraction form
    890.97/1,229.95 = 654.92/x
  3. Step 3: Cross multiply
    890.97x = 1,229.95 × 654.92
  4. Step 4: Simplify right side
    890.97x = 805,515.68
  5. Step 5: Solve for x
    x = 805,515.68/890.97
  6. Step 6: Final answer
    x = 904.09

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.